[ She didn't know it was possible to answer "I don't know" to that question, but that was certainly not a "yes" or a "no". Maybe he was a ghost and didn't realize it? No, he didn't seem like a ghost... And it was even less likely he was a demon.

Regardless, he isn't one that worked his way to immortality. It seems more like it's something coincidental. ]

Let's not find out if that's possible. Even if you do recover quickly, there's no guarantee that you can recover from everything.